Breech-bolt lock for firearms.



J. DUFFEK.

BREECH BOLT LOCK FOR FIREARMS.

APPLICATION FILED JULY 13, 1915.

1,176,663. Patented Mar. 21, 1916.

L I I a I J 6/ W/Ynesses: /nvemo/- z Z 0 e Z 62 STATES PATENT OFFICE.

JOSE DUFFEK, 0F STEYR, AUSTRIA-HUNGARY, ASSIGNOR TO THE FIRM OF OESTER- REICHISCHE WAFFENFABBIKS-GESELLSCHAFT, 0F STEYR, AUSTRIA-HUNGARY.

BREECH-BOLT LOOK FOR FIREARMS.

Specification of Letters Patent.

Patented Mar. 21, 1916.

Application filed July 13, 1915. Serial No. 39,673.

T 0 all whom it may concern Be it known that I, Josue DUFFEK, director of a company, a subject of the Emperor of Austria-Hungary, residing at Steyr, Upper Austria, in the Empire of Austria-Hungary, have invented certain new and useful Improvements in Breech-Bolt Locks for Firearms, of which the following is a specification.

The invention relates to slide bolts adapted to serve as a gun locking means for fire-arms, and upon a selective operation of said look ing means, the breech bolt of the tire arm may be locked in position in the latter or released for removal therefrom, or the firing pin carried by the breech bolt may be locked against operation and thus insure against accidental discharge of the fire arm.

The invention essentially consists of a slide piece disposed crosswise to the axis of the barrel of the gun and having a curved groove to receive a pin fixed eccentrically to a rotatable operating shaft or other suitable part. By rotating the said shaft, the slide piece will move either inward or outward along its bearings. When the slide is moved inwardly to its fullest extent, a flange formed on the firingpin of the gun is engaged by two shoulders provided on the slide-piece, thereby serving to retain said pin in locked position, or when moved outwardly to its fullest extent the slide piece may be drawn back so as to clear the path of the breech-bolt, enabling the latter to be liberated and subsequently to be removed from the weapon. When in normal position, the front face of r the slide piece moves within the path of an abutment or lug provided on the breechbolt, whereby the latter is retained in operative position in the gun. Howe er the firingpin is free to operate and the weapon is ready to be discharged.

In the accompanying illustrative drawings there is shown by way of example a constructional form of slide bolts according to this invention.

Figures 1 to 3 represent the slide piece in various positions shown in cross section. Figs. 4. to 6 represent plan views of the slide piece according to Figs. 1 to 3, partially in section. Fig. 7 illustrates the arrangement of the fixing spring to the lockin shaft.

Referring to these drawings: 5 lever arm 0 is connected to the rear end of a locking shaft 6 lodged in the casing a, while a pin d is eccentrically fixed to the opposite end portion of the said shaft. A slide piece 6 is arranged within the casing crosswise to the axis of the barrel, a curved groove f being formed in the said slide piece.

When in its normal position (Fig. 1), the lever arm 0 is turned downward, and the slide piece 6 is located with its internal surface within the path of the lockin abutment 9 of the breech bolt, while the ange h appertaining to the face portion i of the firing pin is enabled to move past the slide piece 6 whenever this is thrown forward for the purpose of discharging a cartridge (Figs. 1 and 4).

As soon as the locking shaft b is rotated for about 90 by means of the lever arm 0, the eccentric pin d by engaging the curved groove f of the slide piece 6 W111 push this latter outward so that its internal face will lie clear and out of the path of the abutment 9 of the breech-bolt, whereupon the latter may be removed from the weapon (Figs. 2 and 5). Provided now, while the breech-bolt is set, the locking shaft 6 is r0- tated for an additional angle of 90 by means of the lever arm 0, to the position shown in Figs. 3 and 6, then the slide piece e will be moved inward by the eccentrically disposed pin d. The slide piece is provided with a notch at its inner end, which notch is limited by two shoulder pieces k, Z adapted to engage the flange h of the face portion 11 of the firing-pin upon opposite sides thereof, thereby retaining the firing pin in a locked position insuring the safety of the weapon.

In order to maintain the locking shaft b in the position which it assumes at a given time, there is provided a notch for each one of the three positions which it is adapted to assume into the one or the other of which notches a catch m of a spring at fixed in the casing is arranged to engage, thereby preventing a spontaneous rotation of the lockingshaft (Fig. 7). i

It is to be understood that when it is desired to lock the fire arm so that the cartridge will not be discharged, or, in other words, to secure the safety of the weapon, the slide 0 is moved inwardly to its fullest extent, as shown in Figs. 3 and 6, whereby the latter engages the flange h of the firing pin so as to lock the same against operation. However, by this locking of the firing pin, the breech-bolt is locked in position agamst removal from the fire-arm since the slide 6 is in the path of the abutment g.

Claims:

1. In fire arms, a casing arranged on the gun, a slidable member disposed within said casing and having a movement crosswise to the axis of the barrel, said member having a curved groove therein, a rotatable shaft arranged in said casing, and a pin projecting from and eccentric to the shaft and extended into said slot, whereby the gun is locked against use or released by the rotation of the shaft.

2. In fire arms, the combination with a firing-pin formed with a lug thereon; of aslidable member mounted on the barrel of the gun and having a movement crosswise to the axis thereof and in the path of said lug; and a rotatable shaft on the gun connected with said slidable member so that the rotation of the shaft imparts motion to said member, thereby locking said firing-pin against operation or releasing the same according to the position of said slidable member.

3. In a fire arm, the combination with a slidable breech bolt carrying a firing-pin; of a slidable member arranged on the fire arm and adapted to lock said breech-bolt in position, the firing pin against operation, and

permit the removal of said breech-bolt from said fire arm according to the position of the slidable member; a shaft rotatably mounted on the gun and having connection with said slidable member for operating the same; and a finger-piece carried by said shaft to operate the latter, whereby when said fingerpiece is in one position said breech-bolt is locked in position, when in another position removal of the breech-bolt is permitted, and when in another position the locking of the firing-pin and the breech-bolt are efi'ected.

4. In a fire-arm, the combination with a slidable breech-bolt carrying a firing pin; of a slidable locking member arranged on the fire-arm and adapted, when in one position, to retain said breech-bolt in position in the fire-arm, when in another position, to permit the removal of said breech-bolt from said fire-arm, and when in another position, to lock said firing pin against operation;

and means for operating said slidable member.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOSEF DUFFEK. Witnesses:

ARTHUR LINDENSTEAD, AUGUST FUGGER. 

